package demo4;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class Update {
    public static void main(String[] args) throws SQLException, ClassNotFoundException {
        Connection connection =SqlConnection.getCon();
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户id：");
        int id = scanner.nextInt();
        System.out.println("请输入用户名：");
        String username = scanner.next();
        String sql="update users set username = ? where id = ?";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        preparedStatement.setString(1,username);
        preparedStatement.setInt(2,id);
        int i = preparedStatement.executeUpdate();
        if(i>0){
            System.out.println("修改成功");
        }
        else{
            System.out.println("修改失败");
        }
    }
}
